package com.mego.tzadd.utils;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.util.Log;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class CrashHandler implements UncaughtExceptionHandler {
    
	public static final String TAGINFO = "ERROR";
	
    public static final String TAG = "CrashHandler"; 
    // 系统默认的UncaughtException处理类
    private UncaughtExceptionHandler mDefaultHandler;

    // CrashHandler实例
    private static CrashHandler INSTANCE = new CrashHandler();

    // 程序的Context对象
    private Context mContext;

    // 用来存储设备信息和异常信息
    private Map<String, String> infos = new HashMap<String, String>();

    // 用于格式化日期,作为日志文件名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    /** 保证只有一个CrashHandler实例 */
    private CrashHandler() {
    }

    /** 获取CrashHandler实例 ,单例模式 */
    public static CrashHandler getInstance() {
        return INSTANCE;
    }

    /**
     * 初始化
     * 
     * @param context
     */
    public void init(Context context) {
        mContext = context;
        // 获取系统默认的UncaughtException处理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 设置该CrashHandler为程序的默认处理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {  
            //如果用户没有处理则让系统默认的异常处理器来处理  
            mDefaultHandler.uncaughtException(thread, ex);  
        } else {  
//            try {  
//                Thread.sleep(3000);  
//            } catch (InterruptedException e) {  
//                Log.d(TAG, "error : "+ e);  
//            }  
          //退出程序  
          /*  ExitSystem es = new ExitSystem(mContext);
            es.setExitFlag(true);
            es.onExit();*/
        	
        	// 没有有效的出错后退出软件的机制钱，出错记录后依然交给系统管理
        	mDefaultHandler.uncaughtException(thread, ex);  
        }  
    }
    
    /** 
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成. 
     *  
     * @param ex 
     * @return true:如果处理了该异常信息;否则返回false. 
     */  
    private boolean handleException(Throwable ex) {  
        if (ex == null) {  
            return false;  
        }  
//        //使用Toast来显示异常信息  
//        new Thread() {  
//            @Override  
//            public void run() {  
//                Looper.prepare();  
//                Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_LONG).show();  
//                Looper.loop();  
//            }  
//        }.start();
        
       /* mContext.startService(new Intent(mContext, LockService.class));*/
        
        //收集设备参数信息   
        collectDeviceInfo(mContext);  
        //保存日志文件   
        saveCrashInfo2File(ex); 
        return true;  
    }  
      
    /** 
     * 收集设备参数信息 
     * @param ctx 
     */  
    public void collectDeviceInfo(Context ctx) {  
        try {  
            PackageManager pm = ctx.getPackageManager();  
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);  
            if (pi != null) {  
                String versionName = pi.versionName == null ? "null" : pi.versionName;  
                String versionCode = pi.versionCode + "";  
                infos.put("versionName", versionName);  
                infos.put("versionCode", versionCode);  
            }  
        } catch (NameNotFoundException e) {  
            Log.d(TAG, "an error occured when collect package info"+ e);  
        }  
        Field[] fields = Build.class.getDeclaredFields();  
        for (Field field : fields) {  
            try {  
                field.setAccessible(true);  
                infos.put(field.getName(), field.get(null).toString());  
                Log.d(TAG, field.getName() + " : " + field.get(null));  
            } catch (Exception e) {  
                Log.d(TAG, "an error occured when collect crash info"+ e);  
            }  
        }  
    }  
  
    /** 
     * 保存错误信息到文件中 
     *  
     * @param ex 
     * @return  返回文件名称,便于将文件传送到服务器 
     */  
    private String saveCrashInfo2File(Throwable ex) {  
          
        StringBuffer sb = new StringBuffer();  
        for (Map.Entry<String, String> entry : infos.entrySet()) {  
            String key = entry.getKey();  
            String value = entry.getValue();  
            sb.append(key + "=" + value + "\n");  
        }  
          
        Writer writer = new StringWriter();  
        PrintWriter printWriter = new PrintWriter(writer);  
        ex.printStackTrace(printWriter);  
        Throwable cause = ex.getCause(); 
        while (cause != null) {  
            cause.printStackTrace(printWriter);  
            cause = cause.getCause();  
        }  
        printWriter.close();  
        String result = writer.toString(); 
        Log.e(TAGINFO, result);  
        
        sb.append(result);  
        try {  
            long timestamp = System.currentTimeMillis();  
            String time = formatter.format(new Date());  
            String fileName = "crash-" + time + "-" + timestamp + ".txt";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {  
                String path = Environment.getExternalStorageDirectory() + "/Mego/logs/";//MobileOACommonDefine.getLogPath()+MobileOACommonDefine.getSlash();
                File dir = new File(path);  
                if (!dir.exists()) {  
                    dir.mkdirs();  
                }
                FileOutputStream fos = new FileOutputStream(path + fileName); 
                fos.write(sb.toString().getBytes());  
                fos.close();  
            }  
            return fileName;  
        } catch (Exception e) {  
            Log.d(TAG, "an error occured while writing file..."+ e);  
        }  
        return null;  
    }  

}
